Wordpress custom button shortcode

wp-button-shortcode

/*******
* Shortcode for buttons
*******/

function cta_button_func( $atts,  $content = null ) {
	extract( shortcode_atts( array(
		'href' => 'http://10.6.11.245/barrettlawoffices.com/',
		'size' => 'text',
	), $atts ) );
	switch($atts['size']){
		case 'text':
			$button_size = 'tx';
			break;
		case 'small':
			$button_size = 'sm';
			break;
		case 'large':
			$button_size = 'lg';
			break;
		default:
			$button_size = 'tx';
			break;
	}
	
	return '<a href="'.$atts['href'].'" class="cta-button-'.$button_size.'">'.$content.'</a>';
}
add_shortcode( 'cta_button', 'cta_button_func' );